Egypt's state prosecutor has died hours after a powerful bomb hit his convoy in Cairo on Monday, officials said, following jihadist calls for attacks on the judiciary to punish a crackdown on Islamists.

Burundians voted Monday in controversial elections amid an opposition boycott and a string of grenade attacks, with the election commission claiming a "massive" turnout despite many stations being quiet.

At least five people have been killed and 10 wounded after a suicide bomber blew himself up outside a leprosy hospital on the outskirts of the northeast Nigerian city of Maiduguri, emergency services said.